Design patterns are proven solutions to common problems that software developers face in their work. There are many design patterns available, but here are the 8 design patterns that every developer should know:
Ensures that only one instance of a class is created, and provides a global point of access to it.
- ### Factory Pattern
Provides a way to create objects without exposing the creation logic to the client and refers to the newly created object through a common interface.
- ### Adapter Pattern
Allows incompatible interfaces to work together, by converting the interface of one class into another interface that the client expects.
- ### Observer Pattern
Defines a one-to-many dependency between objects, so that when one object changes state, all its dependents are notified and updated automatically.
Dynamically adds or alters the behaviour of an object at run time, without affecting the behaviour of other objects in the same class.
- ### Strategy Pattern
Defines a family of algorithms, encapsulates each one, and makes them interchangeable. Strategy lets the algorithm vary independently from clients that use it.
- ### Command Pattern
Encapsulates a request as an object, thereby letting you parameterize clients with different requests, queue or log requests, and support undoable operations.
- ### Facade Pattern
Provides a unified interface to a set of interfaces in a subsystem. Facade defines a higher-level interface that makes the subsystem easier to use.
These patterns are widely used in software development, and mastering them can make you a better developer. Understanding these patterns will not only help you to write better code but also to communicate more effectively with other developers who use these patterns.
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